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Definition of alveolus (noun) - air sac in the lung; part of the jaw that supports the teeth; any small cavity
Plural: AlveoliExample sentences with this word:
- Exchange of gases occurs in the alveolus.
- Babies born preterm are likely to lack surfactant -- a material that covers the surface of the lung, lowering surface tension in the alveolus and thereby preventing lung collapse on breathing out.